Permutation-lock



C. L. LUNDSTEDT.

PERMUTATION LOCK.

APPL'lCATlON FILED AUG.Z5, 1919.

Patented Nov. 2, 1920.

2 SHEETSSHEET l.

XIII 16 LEI c. L. LUNDSTEDT.

PERMUTATION LOCK.

APPLICATION FILED AUG.25, I919.

Patented Nov. 2, 1920.

2 SHEETSSHEET 2.

UNITED STATES PATENT OFFICE.

HAIR-LES L. LUNDSTED'I, OF LYNN, MASSACHUSETTS.

PERMUTATION-LOCK.

Application filed. August 25, 1919.

To (ZZZ whom it may concern:

Be it known that I, CHARLES L. LUND- error, a citizen of the UnitedStates, resid ing at Lynn, county of Essex, Commonwealth ofMassachusetts, have invented certain new and useful Improvements inPermutation-Locks, of which the following is a specification.

This invention relates to permutation locks, and is particularlydesigned for application to the doors of club and lodge rooms or thelike, where entrance is denied unauthorized persons but permitted theclub members. The usual locks for this purpose are of the familiar keytype and each club member is furnished with a key. It frequentlyhappens, however, that the keys are lost or misplaced, with resultantinconvenicnce to the club member, and, moreover, the keys represent aconsiderable item of expense, especially where the membership is large.

To the end therefore of providing a simple and effective lock of thepermutation type which will .overcome these objections to the ordinarykey lock, I have devised my present invention. In it, I secure theadvantages of the ordinary key look but avoid the objection as to theuse of keys, all in a construction which is at once simple and reliable.

The construction and operation of my lock, together with an embodimentwhich well illustrates the principles involved, is disclosed in theaccompanying specification and drawings, throughout which like referencecharacters are correspondingly employed. In the drawings:

Figure I is a face view of a lock in accordance with my inventionapplied to a door and as een from the outside.

Fig. II is an edge view thereof.

Fig. III is a plan view of the lock casing with cover plate removed andshowing the parts in their unlocked position.

Figs. IV, V, VI, VII and VIII are simi lar details illustratingtheseveral positions of the locking elements.

Figs. IX, X, XI, and XII are details of the night latch mechanism, Fig.XI being a section on the line XI-XI of Fig. IX.

Fig. XIII is a transverse section through the lock casing, and

Figs. XIV, XV, XV I, and XVII are details of the ermutation elements.

In Figs. and II I have shown my loclt Specification of Letters Patent.

Patented Nov. 2, 1920.

Serial No. $19,739.

as applied to a door 1, which is suitably two-part casing comprising acompartmentdefining portion 5 and a removable cover portion 6 withinwhich the locking parts are lncased. The portion 5 may be convenientlysub-divided, as by the partition 24, and on one side of the partition isarrangedthe locking bolt and spring latch and the operating mechanismtherefor, and on the op posite side of said partition is arranged thepermuatation tumbler mechanism and the fingercatch for the locking bolt.

Reciprocable within the casing by the door knobs 7 and 8, subject to thepermutation feature and safety catch, is a locking 7 bolt 9, the shank10 of which is slotted lon-v 1 gitudinally as indicated at 11 andlaterally notched as indicated at 12, Fig. VII, and

is guided on a toothed slide 13, which is similarly slotted and notched,as indicated at it and 15 respectively, Fig. V. The slide 13 is guidedon a fixed guide pin 16 which projects through the registering slots 11and 14, arnd the teeth of the slide 13 are indicated at 1 Meshing withthe rack teeth 17 is a pinion 18 on the end of a tumbler shaft 19whereby to permit or prevent movement of the bolt according to therelation of the tumbler detents 37 on said shaft with respect to theslots of the tumbler wheels, A, A As many tumblers may be provided asdesired.

As here shown, each tumbler comprises a pair of complementary wheels A,A which may be relatively adjusted to give any desired combination andwhich are connected to rotate together, as by the pins 29 on wheels Aengaging in an annular series of holes 30 in wheels A The wheels A areeach provided with a peripheral series of slots 31 and the wheels A witha single peripheral slot-:32, and each pair of tumbler wheels is mountedupon an individual spindle 33 which is adapted to be rotated as by thethumb knobs 34 applied to opposite ends of the spindles over the facesof dials 35 on the inside and outside plates 3 and i of the door, theknobs 3 L carrying pointers 36 which travel over said dials.

shaft 19, whereby to permit said shaft to rotate as the door knob isturned to move the bolt 9, and thus to permit the bolt 9 to be moved.

The combination may be. changed as often as desired, and in order toprevent the lock being picked by feeling, one of the tumbler wheel pairsmay be reversed as to the others. The dials may be reproduced inreversed order upon the inside door plate so that the combination may beworked from either side of the'door, and the several tinnbler wheels maybe retained in the assembly shown in thedrawings as by the opposed bladesprings 35 V The bolt 9 is. advanced or retracted by operation of thedoor knob spindles 38 39. As here shown, one spindle 39 is threaded intothe opposite spindle 38. The spindle 38 carries a wing piece 4:0 adaptedto cooperate with the tail piece of a spring latch 141 which r cin'ocates within the casing 5 in a path parallel tothat of the bolt 9,and the spindle 39 carries sleeve 3-9 having a pair or spacedsuperposedpawls -11 and 4.2 of different lengths and set at differentangles to each other. The pawl 42 is adapted, upon rotation of thespindle 39, to initially actuate the locking lever 20 for the bolt bandto subsequently actuate said bolt, and the pawl ll is-adapted to actuatethe rack slide 13 substantially simultaneously with the actuation of thebolt by pawl 412.

The locking lever 20 overlies the bolt shank 10 and is pivoted on theguide pin 16. Said lever has a bayonet slot 21 into which extends alocking'pin 22 fast on the bolt. Normally the pin 22 is disposed at theinner end of the slot 21, as shown in Fig. 111. Whenever the tumblersare properly positioned for the combination at which the lock is set(see Fig. IV) and the knob spindle 39 is turned, the shorter pawl 42engages theadjacent edge of the locking lever and swings said lever uponits pivot 16 to allow the locking pin 22 to clear the shoulder 21 of thelocking slot 21, and it the bolt be in condition to advance, said pinfinally seats at the outer end of the locking slot, whereby to lockthebolt in its projected position. After the locking lever 20 has beenrocked on its pivot by pawl 42 to release the bolt,

7 the further rotation of the spindle 39, moves pawl 12 into notch 12 ofbolt shank 10 and pawl 11 into notch 15 of rack slide 13 (see F advancedas the spindle is turned, the advance of the slide being permitted byreason of the registration of the tumbler notclties vhereby bolt andslide will be with the detents 37 which simply pass therethrough as thetumbler shaft 19 is rotatec by engagement of the rack teeth 17 of theslide with pinion 18 of the tumbler shaft,

and such action permitting advance of the the tumblers in properposition to permit, the bolt is retracted by rotating spindle 39 7 inreverse direction, the reverse of the ne tion described in connectionwith the pro- Jectlon of the bolt taking place. in such reverse motion,the longer pawl 11 strikes the ad acent arm 4:45 of a forked operatinglever, which is pivoted at 16, and has its opposite arm l7 disposed tostrike an abutment 18 on the tail piece of thespring latch when saidlever is swung upon its pivot by said pawl, whereby to retract thespring latch.

The locking lever is under spring control as to its pivotal movement, asby the curved blade23, which. is anchored at one end to the lockinglever and has its free end confined between said locking lever and thepartition 24; of the casing. The spring for the latch is indicated atd9, Fig. 111, and normally tends to maintain the latch projected, andthe latch is guided in its, movements by a fixed guide pin 51 whichprojects through an elongtatedslot 52 formed in the shank of the tailpiece. 7

- When turned to the position of Fig. V1, the pawl on spindle 38 engagesina shallow notch 53 formed in the tail piece, and prevents projectionof the latch. The locle ing bolt may be secured in its retractedposition by a linger-operated catch exposed whcn the door-is unlockedthrough suitable openings in the face plate 2. As here shown, said catchcomprises a pair of depressible buttons 25 which are connected toopposite ends of centrally pivoted, spring backed lever 26 havingpivoted thereto a locking pawl 27 adapted to be projected into alockingnotch 28 formed in an-adja- 7 cent edge of the bolt shank.

See Fig. 111. As a supplement to the tumbler lock, 1 provide a dominantlatch mechanism operative from the interior-ct the room only, andserving when set to physically lock the outside knob spindle againstrotation. As here shown, such mechanism comprises a pivoted dog mountedin akerfed block 56 set within the casing adjacent the knob spindle, andhaving a tail piece 57 provided with a threaded socket 58 to receive athreaded. stem 59 and with a locking pin 60 which normally lies withinthe keri. of the I l 1 A clock as shown n Fig.

15y drawing. outwardly upon the stem 59,

drawn from the kerf of the block and be seated on the upper faceof theblock straddling the ker'l as shown in Fig, 1K, by a partial rotation ofthe threaded S'tOm 5o.

it will thus be seen that I provide a lock which combines the functionsof the ordinary law-operated bolt and spring latch with a permutationfeature dominating the bolt, but subject to the socalled dominant latchmechanism which is operable only from inside the room.

Various modifications in the construction and arrangement of parts mayalso obviously be made within the limits of the appended claims.

W hat I therefore claim and desire to secure by Letters Patent is:

1. A look comprising a bolt, a slide, a tumbler slia'lt adapted to berotated by said slide and having a detent, a tumbler having a slotadapted to be registered with said detent to permit movement of thebolt, and a spindle having a pair of pawls adapted upon rotation of thespindle to respectively engage the bolt and slide to advance or retractsaid elements when said tumbler slot is registered with said detent.

2. A lock comprising a bolt, a slide, a tumbler shaft adapted to berotated by said slide and having a detent, a tumbler having a slotadapted to be registered with said do} tent to permit movement of thebolt, a locking: lever normally disposed. to prevent movement of thebolt, and a spindle having a pawl adapted upon rotation of the spindleto initially actuate said lever to release the bolt and to subsequentlyengage and move the bolt, and having a pawl adapted to engage and movethe slide when said tubular slot is registered with the detent.

A lock comprising a slide, a bolt associated therewith, a tumbler shafthaving a tumbler detent, an operative connection from said shaft to theslide, and a plurality of tumbler wheels comprising each a pair oisiuperposed disks adapted to rotate as a unit but connected to eachother for relative adjustment, one disk havlng a peripheral series oislots, and the other disk having a single peripheral slot, and saidslots of the disk pair adapted to be registered with said tumbler detentto permit movement of the slide, and means moving the bolt uponI{lStl'lilO11 of said slots.

l. In combination with a door havlng a mortise. a lock casing seated insaid morwheels in said casing controlling said bolt and operable by saidtumbler spindles, a tumbler detent, a slide associated with said boltand operatively connected with said detent, and means associated withsaid doorknob spindles and adapted to advance or retract said bolt andslide when the tumbler wheels are properly positioned relative to saiddetent.

5.,In combination with a door having a mortise, a lock casing seated insaid mortise, door knob and tiunbler spindles entering said casing fromopposite. sides of the door, a bolt in said casing operable by rotationof the door knob spindles, tumbler wheels in said casing controllingsaid bolt and operable by said tumbler spindles, a tumbler detent, and adominant latch mechanism operable from the inside of the door'ndependently of the tumblers to prevent movement of the bolt bymanipulation of the tumblers from without the door.

6. In combination with a mortised door,

a lock casing seated in said mortise, door knob spindles entering saidcasing from opposite sides of the door, a bolt in said casing operableby rotation of said spindles, a dominant latching mechanism for saidbolt operable from the inside of the door, and comn-isinp; a pivoteddog, a bolt actuator on one of the door knob spindles adapted to belocked by said dog, and an operator for said dog arranged on the innerside of the door, and a permutation lock for said bolt subject to saidlatching mechanism.

7. in combination with a mortised door, a iock casing seated in saidmortise, door knob spindles entering said casing from opposite sides ofthe door, a bolt in said casing operable by rotation of said spindles, ahub sleeved about one oi said spindles and having a bolt actuating pawland a locking slot, a dominant latch mechanism for said bolt comprisinga dog pivoted for movement into and out of said slot of the boltactuating pawl, an operator for said dog operable from inside the door,and a permutation lock for said bolt subject to said latch mechanism.

8. In combination with a mortised door, a lock ca sing seated in saidmortise, door knob spindles entering said casing; from opposite sides ofthe door, a bolt in said casing operable by rotation of said spindles, ahub sleeved about one of said spindles and hav ing: a bolt actuatingpawl and a locking slot, a dominant latch mechanism for said boltcomprising a pivoted dog having a head movable into and out of said slotof the bolt actuating pawl and having a tail piece, an operatoreiig'agingsaid tail piece and operable from inside the door to rock saiddog on its pivot, and a permutation lock for said bolt subject to saidlatch mechanism.

9. In combination with a mortised door, a

lockcasing seated in said mortise, door knob spindles entering saidcasing from opposite srdes ot the .door,:a :bolt in SitlClCELSlIlg.operable by rotationoi' said spindles, a spring latch mounted in saidcasing adjacent said bolt, a pawl mounted upon one of said spindleseffective when swung in one direction to advance :said bolt i and whenswung in the opposite direction to retract said spring-latch, adominantulatching mechanism forsai'd bolt, anda permutation lock forsaid bolt subject to saidlatchingmechanism. 10.111 combination witha'mortised door,

;'a lock casing seated in said mortise, "door knobspindles-enterlngz;said caslng" from oposite si'des of the door a bolt in said casin p 7 hoperable by rotation of said spindles, a spring" latch mounted in saldcaslng adjacent said'bolt, a hub sleeved aboutone of sald withthe-spril'lg latch to retract said latch, a dominant latching mechanismfor said bolt and a permutation'loc'k for said bolt subject to saidlatcl'iing mechan sm.

'11. In combination with a mortised door aloc'k casingseated insaid-mortise, door kllObSDl-HCHGS GIItGIlIIg'SELlCl casing from oppositesides of the -door, a boltin-saidcasing operable by rotation of saidspindles, a

-springlatch mountedin'said casing adjacent said belt, a pawlmountedupon one of said spindles and effective when swung in one'ClIIGGtIOH to advance sald bolt and when swung 1n the oppositedlrectlon to retract said-spring latch, a dominant latching mechanismfor said bolt comprising a dog pivoted for movement intolatchingengagement with said, pawl, an operator for said dog operablefrom inside the-door,, and a permutation lock for said bolt subject tosaid latching mechanism.

In testimony whereof-TafiiX my signature in presence of a =witness.

GI-IARLE-S 5L. LUND STEDT. Witness:

' GEORGE B; RAwLINes.

